Worksheet-Change und Blattschutz

Private Sub Worksheet_Change(ByVal Target As Range)
Dim s%, m%
Dim a, t, j, ZielBereich As Range
If Target.Count > 1 Then Exit Sub
'Soll Zeit nur bei einer Eingabe in Spalte H und I wirksam werden:
If Target.Column > 7 And Target.Column < 10 Then
With Cells(Target.Row, Target.Column)
If .Value = "" Then Exit Sub
If IsNumeric(.Value) And InStr(.Value, ":") = 0 And InStr(.Value, ",") = 0 Then
.NumberFormat = "[hh]:mm"
If Len(.Value) > 2 Then
s = Left(.Value, Len(.Value) - 2)
m = Right(.Value, 2)
Else
s = .Value
m = 0
End If
.Value = s & ":" & m
End If
End With
End If
End Sub